<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        /* .box{
      font-size: 10px;
    }
    .wrap{
      width: 10vw;
      height: 10vh;
      background-color: red;
    } */
        * {
            margin: 0;
            padding: 0;
            font-size: 0;
        }

        .box {
            width: 25vw;
            display: inline-block;
            height: 100px;
            background-color: pink;
        }

        @media screen and (max-width: 1000px) {
            .box {
                width: calc(100vw/3);
            }
        }
    </style>
</head>

<body>
    <div class="box"></div>
    <div class="box"></div>
    <div class="box"></div>
    <div class="box"></div>
    <div class="box"></div>
    <div class="box"></div>
</body>

</html>